I'm a F(21) I mostly love console games, like N64 and some Gamecube. I've wanted to get more into gaming and have some fun with it. Some games i've played and enjoyed are: Portal, Super Meat Boy, Minecraft, LOL. The games i really enjoy are Super Mario 64, Mario Tennis, Mario Kart, Dead Island, Crazy Taxi and Little Big Planet. I have a Steam Account and i know TF2 is free so i may download that too. What are some other good ones to start?
I should add: I have a Macbook

Also if you like console games, and their controls, you may want to pick up a wired xbox 360 controller(It's simply a USB connection). My wife doesn't care for the keyboard/mouse setup, but since we got the controller she has enjoyed PC games a lot more.

Games made by Bioware(Knights of the Old Republic, Mass Effect series, etc) are fun, and tend to have a good story as well.

I'd also recommend Bastion. I got the game during the winter steam sale and I've really enjoyed it.

I do have an N64 emulater on my Mac, and i've been using a logitech usb controller for that. I usually play Super Mario, i would play Mario Tennis but some some reason non of the Roms for it work on my Mac :(